Changes in the properties and structure of hydrogen-storage electrodes after long-term charge/discharge cycling

Studies are focused on the changes in the properties and structure of hydrogen-storage alloy electrodes used in Ni/MH batteries after long-term cycling. Experimental results show that the alloys are pulverized after a large number of cycles and La(OH)3, Al(OH)3 and LiMnO2 are formed on the surface of the alloy. This results in degradation of the hydrogen-storage alloy electrodes.